function
abstract
apoplexy
brain
cerebral
challenge
communication
concept
confusing
connections
convoluted
dementia
depression
design
desperate
disease
education
eeg
epilepsy
head
health
hemisphere
hopeless
human
icon
illness
illustration
intractable
intricate
knot
medical
medicine
migraine
nervous
neurology
person
problem
rope
seizure
silhouette
spasm
tangled
task
thinking
treatment
trouble
tumor
unsolvable
unsolved